Kiddy Kong makes his first appearance as one of the main playable characters alongside Dixie Kong in Donkey Kong Country 3: Dixie Kong's Double Trouble!. At Funky's Rentals in the Northern Kremisphere, Kiddy Kong is playing with items until Dixie Kong arrives, who is searching for Donkey Kong and Diddy Kong, who had gone exploring the DK Isles but had not returned home for two days. Because Kiddy Kong has high strength, Funky Kong recommends Dixie Kong to take Kiddy Kong with her to search for Donkey Kong and Diddy Kong. They had disappeared due to Kremling Krew capturing them, now lead by KAOS on Mekanos. After the Kongs defeat KAOS in his castle in KAOS Kore, they discover KAOS is actually King K. Rool, in his Baron K. Roolenstein alias, controlling KAOS from behind the scenes. In the post-game, both characters are charged by Wrinkly Kong with finding the hidden Banana Birds hidden across the continent to rescue the Banana Bird Queen, who had been imprisoned by Baron K. Roolenstein.

In the Club Nintendo comic "Donkey Kong in: Banana Day 24", a huge UFO begins pulling the Earth away from the sun, resulting in a sudden drop of temperature all over the planet. This also affects the Kongs' jungle, so Donkey Kong, Diddy Kong, Dixie Kong, and Cranky Kong set off to carry out negotiations with the aliens. Kiddy Kong joins them on their mission into space. However, he stays in the space shuttle with Cranky Kong, while Donkey Kong, Diddy Kong, and Dixie Kong begin discussions with the aliens. Their mission ultimately ends in success, and the aliens leave the planet in peace. At the end of the comic, Donkey Kong is depicted joyfully throwing Kiddy Kong in the air.

In Donkey Kong Land III, Kiddy Kong joins Dixie Kong in her quest to find the Lost World. A contest to find the Lost World is being held in the Northern Kremisphere, and the one who finds the hidden land first is rewarded with great treasures. Donkey Kong and Diddy Kong depart search of the Lost World, while leaving Dixie Kong behind. To show them that she is just as adventurous as they are, she takes Kiddy Kong to go along in another adventure. During the travels, Baron K. Roolenstein, now restored to power in the Kremling Krew, is also looking for the Lost World, in which Dixie Kong and Kiddy Kong meet and defeat Roolenstein. In the end, Dixie Kong and Kiddy Kong prove they are just as heroic as Donkey Kong and Diddy Kong.

In Donkey Konga 2, Kiddy is mentioned in one of Dixie's notes. In it, Dixie states that he played the bongos for the first time and understood the principle of hitting both sides at the same time immediately. Due to a translation oversight, Kiddy is referred to as Dinky, his Japanese name.

Kiddy Kong has the typical ape-like attributes associated with every Kong, and his appearance has currently never changed. He is a portly toddler who wears light blue pajamas and sometimes a green pacifier (which he is only shown wearing in his artwork and never in-game). His pajamas are short sleeved with a few yellow, round buttons on them, and his pants go all the way around his feet. Because of Kiddy's short and small legs, his pajamas appear to be a little too big for him. Kiddy's arms, however, appear to be quite long and burly, displaying his strength. Even as a toddler, he is much bigger than his partner, Dixie Kong, in size, and is about the same size as Donkey Kong. However, because he is so large, he is shown to be very heavy, and he can hardly be lifted up by Dixie.

Kiddy Kong's hair appears to be a dark brown color, but it is a little brighter near the top of his head, which forms a point similar to Donkey Kong's hair. His eyes are also brown, and they resemble Dixie and Diddy Kong's large eyes. Kiddy is shown to be a little chubby, as his mouth is much bigger than any other part of his face. While his mouth is very big, he has very small ears and a tiny nose. Kiddy is overall the youngest member of the Kong family, being three years old. [2]

Kiddy Kong's main technique is his rolling ability, where it allows him to defeat many types of enemies, as well as enhance his jumping ability. If he rolls off a ledge then jumps, he can make leaps that are much longer than the average jump. Kiddy can also skip across bodies of water by rolling off dry land and jumping just as he hits the surface. In fact, he can make multiple rolling jumps across the water that get progressively higher with each successive skip. This ability allows Kiddy to traverse long sections of water without having to swim through them.

Given his strength, he can pick up objects and certain stunned enemies and throw them with ease. As the other Kongs, Kiddy has decent running ability. Although young, he can climb as well as any other member of the Kong Family.

Some abilities of Kiddy Kong are revealed only when he teams up with Dixie. Using his strength, Kiddy can throw Dixie long distances. By tossing Dixie upwards, Kiddy can help her reach areas and objects that are not within their jumping range. When Kiddy is thrown upwards by Dixie, Kiddy falls down, smashing through fragile areas in the ground. This often reveals Bonus Barrels and other secrets. Lastly, if Dixie throws Kiddy against a wall, then jumps on her cousin before the toddler stops rolling, she can ride on top of him as if he were a Steel Barrel.

Kiddy Kong, as his name implies, has a childish personality, being a toddler. For example, when Kiddy is defeated and loses a life, he throws a tantrum, crying loudly and slamming his fists down. He is simple and curious like a child; Dixie Kong first finds Kiddy chewing on an old tire, and when the player is not controlling him, he will often pull on his sock. However, he likely does not understand the greater consequences of his actions. For example, if Kiddy and Dixie get a Game Over, the two are imprisoned in a crib with child's toys. While Dixie is clearly upset over being captured, the arrangement upsets him less than Dixie. Kiddy is also considered to have a personality similar to Donkey Kong and Diddy Kong, as he seems to be getting into trouble all the time.

Despite this, the letters on the Kong Barrel with him inside still read DK.

However, his Japanese name is "Dinky Kong."[3] Dinky Kong was also among the names considered by Rare before Kiddy Kong became the final Western name.[4]

Furthermore, one of the other names considered was "Tiny Kong," which would instead later become the name of a different character debuting in Donkey Kong 64, released three years later after the release of Donkey Kong Country 3.